My advice would be to breed a beef bull to your dairy cow, so that you get a beefier calf to sell at auction or for your own meat later.
I do love the "look" of a Jersey cow, but they have slipped in popularity to the Holsteins, as have all other dairy breeds.
Jerseys and Angus are notorious breeds for bulls. I know a man, now deceased, who was out putting a bag of feed in the feeder for his Angus bull when it suddenly charged him. He managed to get under the feeder after the first hit, only because he had never turned his back on the bull and saw it coming, but the bull did not give up and though the feeder protected him, the man did sustain a broken back. Bulls are quick.
My father-in-law ran a Hereford bull. He too is deceased, but that Hereford is still on the farm breeding his Angus/dairy cross cows for my mother-in-law. Hereford is a gentler breed bull, IMHO. He got the black baldies but had a gentler bull.
I always ran Simmental, a very gentle bull as well, to get the Continental cross on my mixed cows. Simmentals are beefy and were originally bred as a meat/dairy/draft animal, so they are even-tempered. Limosin are in the same category as far as meat/draft breeding.
Whatever bull you use, it is important to get them used to you being around and in close proximity. I liked to do that by keeping the bull up in the barnyard for the first couple weeks and getting him used to me being around in there with him and occasionally handing him out some range cubes. The barnyard allows for a quick escape should something go wrong.
I have since sold my cows, but I used to winter a different young bull every year under an arrangement with another farmer where he got the winter weight gain and I got the service. So it was important that I tame each one coming in.
I would suggest you might find a similar arrangement with a larger herd owner in your area if you get to where you are running a few head of your own cows. It has advantages, including that no bull on the place 9 months a year saves you upkeep costs and brings all your cows into sync on heat. When you then introduce the bull and his phermones, the cows all cycle right along. At the end, I had it where all my calves would be dropped within a 10-12 day window...with natural service.
At any rate, the advice here is valid...don't turn your back on any bull. And be sure your bull always can clearly see you, too. Don't move in and out of his blind spots (directly in front of and directly behind him). When you are with your bull, you want to make predictable and measured moves. As you tame it up, you want to move in the same ways each time and talk low to it while you do that. Take your time around the bull and don't rodeo it or even try to be in doing stuff with it when you are in a hurry to get on to something else. All those things are picked up by the bull, who can interpret them as threats to its well-being.
Well, I've yammered enough. Hope it helps somehow.
